During the 2010 general election campaign, nearly 10 million viewers tuned in as David Cameron, Gordon Brown and I lined up against each other in the first televised leaders’ debate in British political history.

That debate, along with the two rematches which took place in the weeks that followed, were a defining feature of that election.

It seemed obvious to me, and no doubt to the millions of viewers, that this exciting innovation was here to stay.

Read more and view interview here: